<template>
	<view>
    <my-search @click="gotoSearch"></my-search>
		<view class="scroll-view-container">
      <scroll-view scroll-y class="left-scroll-view" :style="{height: wh +'px'}">
        <block v-for="(item,i) in cateList" :key="i">
            <view :class="['left-scroll-view-item',i === active ? 'active':'']" @click="activeChanged(i)">{{item.cat_name}}</view>
        </block>
      </scroll-view>
      
      <scroll-view scroll-y class="right-scroll-view" :style="{height: wh +'px'}" :scroll-top="scrollTop">
        <view class="cate-lv2" v-for="(item2,i2) in cateLevel2" :key="i2">
          <view class="cate-lv2-title">/ {{item2.cat_name}} /</view>
          <!-- 三级分类列表数据 -->
          <view class="cate-lv3-list">
            <view class="cate-lv3-item" v-for="(item3,i3) in item2.children" :key="i3" @click="gotoGoodsList(item3)">
               <image :src="item3.cat_icon.replace('dev','web')"></image>
               <text>{{item3.cat_name}}</text>
            </view>
          </view>
        </view>      
     
      </scroll-view>
    </view>
	</view>
</template>

<script>
  import badgeMix from '@/mixins/tabbar-badge.js'
	export default {
    mixins:[badgeMix],
		data() {
			return {
				 wh:0,
         cateList:[],
         active:0,
         cateLevel2 :[],
         scrollTop:0
			};
		},
    onLoad(){
      //获取当前系统的信息
      const sysInfo = uni.getSystemInfoSync()
      // console.log(sysInfo)
      this.wh= sysInfo.windowHeight -50
      this.getCateList()
    },
    methods:{
      async getCateList(){
         // 发起请求
         const {data: res}= await uni.$http.get('/api/public/v1/categories')
         // 判断是否获取失败
         if(res.meta.status !== 200) return uni.$showMsg()
         //转存数据
         this.cateList = res.message
         
         this.cateLevel2 = res.message[0].children
      },
      activeChanged(i){
        this.active = i
        this.cateLevel2 = this.cateList[i].children
        this.scrollTop = this.scrollTop ===0 ? 1 :0
      },
      gotoGoodsList(item3){
        uni.navigateTo({
          url:'/subpkg/goods_list/goods_list?cid=' + item3.cat_id
        })
      },
      gotoSearch(){
        // console.log('ok')
        uni.navigateTo({
          url:'/subpkg/search/search'
        })
      }
    }
	}
</script>

<style lang="scss">
.scroll-view-container{
  display: flex;
  .left-scroll-view{
    width: 120px;
    .left-scroll-view-item{
      line-height: 60px;
      background-color: #f7f7f7;
      font-size: 12px;
      text-align: center;
      
      &.active{
        background-color: #ffffff;
        position: relative;
        &::before{
          content: ' ';
          display: block;
          height: 30px;
          width: 3px;
          background: #c00000;
          position: absolute;
          left: 0;
          top: 50%;
          transform: translateY(-50%);
        }
      }
    }
  }

.cate-lv2-title{
  font-size: 12px;
  font-weight: bold;
  text-align: center;
  padding: 15px 0;
}
.cate-lv3-list{
  display: flex;
  flex-wrap: wrap;
  .cate-lv3-item{
    width: 33.33%;
    display: flex;
    flex-direction: column;
    // justify-content: center;
    align-items: center;
    margin-bottom: 10px;
    
    image{
      width: 60px;
      height: 60px;
    }
    text{
      font-size: 12px;
    }
  }
}
}


</style>
